CN212646231U - Soft package lithium ion battery product gas collection device - Google Patents
Soft package lithium ion battery product gas collection device Download PDFInfo
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- CN212646231U CN212646231U CN202021184426.4U CN202021184426U CN212646231U CN 212646231 U CN212646231 U CN 212646231U CN 202021184426 U CN202021184426 U CN 202021184426U CN 212646231 U CN212646231 U CN 212646231U
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Abstract
The utility model belongs to the technical field of the inside gas analysis of lithium cell, a soft packet of lithium ion battery product gas collection device is disclosed, include: the detection device comprises a sealed box body, an inert gas source, a gas inlet pipe and a gas outlet pipe, wherein the box body is communicated with the inert gas source through the gas inlet pipe and is connected with the detection device through the gas outlet pipe; the air inlet pipe is provided with an air inlet closed valve, and the air outlet pipe is provided with an air outlet closed valve. The utility model discloses a set up the intake pipe be connected with the inert gas source and with be used for the outlet duct be connected with gas chromatograph on the box body of placing the battery, utilize large-traffic inert gas to sweep this kind of soft mode, detach other gases in box body and the pipeline environment, can avoid vacuum pump and evacuating device's use, the device overall structure retrencies, reduces the battery simultaneously and rises the risk of exploding.
Description
Technical Field
The utility model belongs to the technical field of the inside gas analysis of lithium cell, especially, relate to a soft packet of lithium ion battery produces gas collection device.
Background
For a lithium ion battery, the characteristic of high voltage endows the lithium ion battery with unparalleled high energy, but the lithium ion battery can generate a large amount of gas by the decomposition of electrolyte or the reaction of the electrolyte and positive and negative pole pieces in storage and long-term charge-discharge cycles, and the gas generation is more obvious particularly under the condition of high temperature or overcharge. Gas generation not only causes swelling and deformation of the lithium ion battery, but also causes loose adhesion between pole pieces of the lithium ion battery, and causes performance attenuation and safety problems of the lithium ion battery, so that research on gas generation mechanism of the battery is urgently needed, the gas generation mechanism is clarified, data support is further provided for development of a battery cell, and the safety performance of the battery is improved. For the sealed system of the battery, air contact is avoided during operation, and gas generation is easy to diffuse, so that the difficulty of gas generation collection of the lithium ion battery is increased.
Chinese patent CN 109142562a discloses a device for collecting and analyzing gas inside a soft-package lithium battery, which comprises a box body, an air inlet pipe, an air outlet pipe, an air extraction needle and an air extraction pipe; the box body comprises an upper box body and a lower box body; the middle position of the lower box body is provided with a battery placing groove. The upper box body covers the lower box body and seals the battery placing groove; the upper box body is also provided with an air inlet pipe orifice, an air outlet pipe orifice, an air taking needle hole and an air exhaust pipe orifice; the air exhaust pipe is arranged at the opening of the air exhaust pipe, one end of the air exhaust pipe is communicated with the battery placing groove, and the other end of the air exhaust pipe is communicated with the inlet of the air exhaust pump; the exhaust pipe is provided with a third airtight valve and a pressure sensor. However, in the process, the expanded soft package lithium ion battery is easily broken in a vacuum state, so that the gas is expanded at the highest speed, and therefore, the danger is brought to experimental detection. Meanwhile, after the lithium ion battery is punctured, solid particles possibly enter the gas chromatography along with the gas, and the performance of the instrument is influenced. Therefore, there is a need for an improvement to existing lithium battery gas collection devices.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a soft packet of lithium ion battery product gas collection device of simple structure, operation safety.
In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a soft packet of lithium ion battery product gas collection device, includes: the detection device comprises a sealed box body, an inert gas source, a gas inlet pipe and a gas outlet pipe, wherein the box body is communicated with the inert gas source through the gas inlet pipe and is connected with the detection device through the gas outlet pipe; the air inlet pipe is provided with an air inlet closed valve, and the air outlet pipe is provided with an air outlet closed valve.
Furthermore, an opening is formed in one side of the box body, a door body is connected to the opening, and a sealing ring is arranged between the door body and the side wall of the box body.
Further, the door body is connected with the box body through a bolt.
Furthermore, the sealing ring and the bolt are made of corrosion-resistant high polymer materials.
Furthermore, the box body is provided with an air extraction needle.
Furthermore, an emergency air guide pipe is further arranged on the box body, and an emergency air outlet closed valve and a pressure gauge are arranged on the emergency air guide pipe.
Furthermore, the gas outlet pipe is also provided with a gas filtering and backflow forbidding device.
Furthermore, the gas filtering backflow prohibiting device is a one-way valve arranged between the gas outlet of the box body and the gas outlet closed valve.
Furthermore, the box body is made of pressure-resistant transparent glass or plastic in an integrated mode.
Further, the gas provided by the inert gas source is argon.
In the technical scheme, the utility model provides a pair of soft packet of lithium ion battery product gas collection device has following beneficial effect:
1. the utility model provides a soft packet of lithium ion battery product gas collection device, through set up the intake pipe that is connected with the inert gas source and with be used for being connected with the gas chromatograph outlet duct on the box body of placing the battery, utilize large-traffic inert gas to sweep this kind of soft mode, remove other gases in box body and pipeline environment, can avoid the use of vacuum pump and evacuating device, the device overall structure is retrencied, reduces the risk that the battery rises and explodes simultaneously;
2. the utility model can filter the solid or liquid which may appear by additionally arranging the gas filtering and reverse flow forbidding device at the starting end of the gas outlet pipe, so that the test result is more accurate and the gas chromatograph is protected;
3. the box body of the utility model is also provided with an emergency air duct and a stop airtight valve, which can lead out and empty the gas under the emergency condition that the air pressure changes suddenly; the gas bag can also be connected to be used as spare gas collection for detection of other equipment.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic structural diagram of a soft package lithium ion battery gas production collection device according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a door body according to a first embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a soft package lithium ion battery gas production collection device provided by the embodiment of the present invention.
Description of reference numerals: 1. an inert gas source; 2. an air inlet pipe; 3. an air inlet closed valve; 4. an emergency airway; 5. an emergency air outlet closed valve; 6. a pressure gauge; 7. a gas taking needle; 8. an air outlet pipe; 9. an air outlet closed valve; 10. a gas filtration non-reverse flow device; 11. a seal ring; 12. a bolt; 13. a door body; 14. and (5) a box body.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
Example one
As shown in fig. 1, the embodiment of the utility model provides a soft packet of lithium ion battery product gas collection device is provided, include: the device comprises a box body 14, an inert gas source 1, an air inlet pipe 2 and an air outlet pipe 8, wherein the box body 14 is of a sealing structure. The box body 14 is communicated with an inert gas source 1 through an air inlet pipe 2 and is connected with a detection device through an air outlet pipe 8; the gas inlet pipe 2 is provided with a gas inlet closed valve 3, the gas outlet pipe 8 is provided with a gas filtering backflow prohibiting device 10 and a gas outlet closed valve 9, and the gas filtering backflow prohibiting device 10 is arranged between the gas outlet of the box body 14 and the gas outlet closed valve 9.
Specifically, as shown in fig. 1 to 2, in this embodiment, an opening is disposed on one side of the box body 14, a door 13 is connected to the opening, and a sealing ring 11 is disposed between the door 13 and a side wall of the box body 14. The door body 13 is connected with the box body 14 through bolts 12. In this embodiment, the door body 13 passes through bolt 12 and is connected with box body 14, then before the experiment begins, can be through unscrewing the bolt, and then open the soft packet of lithium ion battery that the box body will await measuring and put into box body 14, then screw up the bolt, make the box body sealed, bolted connection's mode makes the box body can bear certain pressure, and in addition, the box body is airtight when the experiment can be guaranteed in the setting of sealing washer, make and to discharge the air in the box body completely when sweeping the box body through inert gas, avoid the interference of air to the experimental result.
Further, in this embodiment, the seal ring 11 and the bolt 12 are made of a corrosion-resistant polymer material. In addition, in this embodiment, the gas provided by the inert gas source 1 is argon. The corrosion-resistant high polymer material can resist the damage caused by corrosive gas after the lithium ion battery is punctured in the experiment, and the service life of the device is prolonged.
Further, as shown in fig. 1, in the present embodiment, the box 14 is provided with an air extraction needle 7. The needle point of the air intake needle 7 is arranged towards the inside of the box body 14 and can move towards the direction of the battery in the box body, and then the soft-package lithium battery in the box body is punctured.
Further, in this embodiment, the gas filtration and backflow prevention device 10 is preferably a check valve, and the check valve can prevent solid particles from entering the gas chromatograph along with gas after the lithium ion battery is punctured, so as to affect the performance of the apparatus.
Example two
As shown in fig. 3, for the second embodiment of the present invention provides a schematic structural diagram of a soft package lithium ion battery gas collection device, the same as the first embodiment, in this embodiment, the device includes: the detection device comprises a sealed box body 14, an inert gas source 1, a gas inlet pipe 2 and a gas outlet pipe 8, wherein the box body 14 is communicated with the inert gas source 1 through the gas inlet pipe 2 and is connected with the detection device through the gas outlet pipe 8; the gas inlet pipe 2 is provided with a gas inlet closed valve 3, the gas outlet pipe 8 is provided with a gas filtering backflow prohibiting device 10 and a gas outlet closed valve 9, and the gas filtering backflow prohibiting device 10 is arranged between the gas outlet of the box body 14 and the gas outlet closed valve 9. Different from the first embodiment, in the present embodiment, an emergency air duct 4 is further disposed on the box body 14, and an emergency air outlet sealing valve 5 and a pressure gauge 6 are disposed on the emergency air duct 4.
In this embodiment, the emergency air duct 4 is provided, so that the safety of the experiment can be ensured in an emergency situation where the pressure is increased sharply. Wherein, manometer 6 can survey the atmospheric pressure in the box body at any time, when getting gas needle 7 misoperation and arousing 14 internal pressure of box body and violently increasing, opens urgent air duct 4 through urgent airtight valve 5 of giving vent to anger, can guide the exhaust fast.
Further, in this embodiment, the pressure gauge 6 may be a pressure switch capable of setting a pressure threshold, the emergency air outlet airtight valve 5 may be an electric control valve, and a switch signal output by the pressure switch is set in a control circuit of the electric control valve to control the opening of the electric control valve. When the pressure in the box body reaches a set value, the pressure switch outputs a signal to open the electric control valve, the emergency air duct 8 can exhaust air, and then the embodiment can realize automatic pressure-limiting exhaust of the box body, so that the safety of the experiment is ensured.
The utility model discloses a use method and theory of operation as follows:
1. the soft package lithium battery to be tested is placed into the box body 14, and the door body 13 is installed on the side face of the box body 13 through the sealing ring 11 and the bolt 12, so that the box body 14 is sealed.
2. And then opening the air inlet closed valve 3 and the air outlet closed valve 9, and opening the inert gas source 1 to perform large-flow purging in the box body. After purging for a certain time, the gas chromatograph connected with the gas outlet pipe is used for testing the gas components in the primary box body 14, so that the gas components in the box body 14 are all inert gases, and the gas inlet closed valve 3 and the gas outlet closed valve 9 are closed in the year.
3. The external force pushes the gas taking needle 7, the gas taking needle 7 moves towards the box body 14 and punctures the soft package lithium battery to be detected, so that the internal gas generated by the soft package lithium battery enters the box body, the pressure in the box body can be observed through the pressure gauge 6 on the emergency gas guide pipe 4, and when the internal pressure of the box body 14 is increased suddenly due to improper operation of the gas taking needle 7, the emergency gas guide pipe 4 is opened through the emergency gas outlet sealed valve 5, so that the exhaust can be guided quickly; the gas filtration that sets up on the outlet duct 8 forbids the backward flow of the steerable gaseous of adverse current device, filters simultaneously and restricts possible solid particle and liquid, makes the test result more accurate, can protect gas chromatograph simultaneously.
4. And finally, opening the air inlet seal valve 3 and the air outlet valve 9, and conveying inert gas into the box body through the air inlet pipe, so that the produced gas of the soft package lithium battery is transmitted to a gas chromatograph from the air outlet for gas analysis.
To sum up, the utility model provides a soft packet of lithium ion battery produces gas collection device, through set up the intake pipe of being connected with the inert gas source and with be used for the outlet duct of being connected with the gas chromatograph on the box body of placing the battery, and set up airtight valve of admitting air and airtight valve of giving vent to anger on intake pipe and outlet duct respectively, make the device can utilize large-traffic inert gas to sweep this kind of soft mode, detach other gases in box body and pipeline environment, can avoid the use of vacuum pump and evacuating device, the device overall structure is retrencied, reduce the risk that the battery rises and explodes simultaneously; in addition, the utility model adds the gas filtering device at the initial end of the gas outlet pipe to filter the solid or liquid which may appear, so that the test result is more accurate and the gas chromatograph is protected; moreover, the box body of the utility model is also provided with an emergency air duct and an emergency air outlet closed valve, which can lead out and empty the air under the emergency condition that the air pressure changes suddenly; the gas bag can also be connected to be used as spare gas collection for detection of other equipment.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. The utility model provides a soft packet of lithium ion battery product gas collection device which characterized in that includes: the device comprises a sealed box body (14), an inert gas source (1), a gas inlet pipe (2) and a gas outlet pipe (8), wherein the box body (14) is communicated with the inert gas source (1) through the gas inlet pipe (2) and is connected with a detection device through the gas outlet pipe (8); an air inlet closed valve (3) is arranged on the air inlet pipe (2), and an air outlet closed valve (9) is arranged on the air outlet pipe (8).
2. The soft package lithium ion battery gas production collection device according to claim 1, wherein an opening is formed in one side of the box body (14), a door body (13) is connected to the opening, and a sealing ring (11) is arranged between the door body (13) and the side wall of the box body (14).
3. The soft package lithium ion battery gas collection device according to claim 2, wherein the door body (13) is connected with the box body (14) through a bolt (12).
4. The soft package lithium ion battery gas collection device of claim 3, wherein the seal ring (11) and the bolt (12) are made of a corrosion-resistant polymer material.
5. The soft package lithium ion battery gas production collection device of claim 1, wherein the box body (14) is provided with a gas extraction needle (7).
6. The soft package lithium ion battery gas production collection device according to claim 1, wherein an emergency gas guide tube (4) is further arranged on the box body (14), and an emergency gas outlet closed valve (5) and a pressure gauge (6) are arranged on the emergency gas guide tube (4).
7. The soft package lithium ion battery gas collection device according to claim 1, wherein a gas filtration backflow prevention device (10) is further arranged on the gas outlet pipe (8).
8. The soft package lithium ion battery gas collection device according to claim 7, wherein the gas filtration backflow inhibiting device (10) is a one-way valve arranged between the gas outlet of the box body (14) and the gas outlet closed valve (9).
9. The soft package lithium ion battery gas production collection device of claim 1, wherein the box body (14) is integrally made of pressure-resistant transparent glass or plastic.
10. The soft package lithium ion battery gas production collection device according to claim 1, wherein the gas provided by the inert gas source (1) is argon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021184426.4U CN212646231U (en) | 2020-06-23 | 2020-06-23 | Soft package lithium ion battery product gas collection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021184426.4U CN212646231U (en) | 2020-06-23 | 2020-06-23 | Soft package lithium ion battery product gas collection device |
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| CN212646231U true CN212646231U (en) | 2021-03-02 |
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| CN202021184426.4U Active CN212646231U (en) | 2020-06-23 | 2020-06-23 | Soft package lithium ion battery product gas collection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115598206A (en) * | 2022-10-14 | 2023-01-13 | 吉林大学（Cn） | Lithium ion power battery thermal runaway gas production dynamics testing arrangement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115598206A (en) * | 2022-10-14 | 2023-01-13 | 吉林大学（Cn） | Lithium ion power battery thermal runaway gas production dynamics testing arrangement |
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